I downloaded and ran the free version: everything looks fine.
However the program does not appear with a right click on a folder/file. So I clicked on the “plus” icon, navigated to the folder I wanted to encrypt, and a field appears asking for a filename, even if I double click on the folder. If I enter in the field the folder name all it does is open the folder – and asks for the field to be entered!
If the above does not help,please provide more information about the issue and write a mail to firstname.lastname@example.org . you can send a screenshot showing where the problem is, it often helps us understand.